Abolish Schmabolish, is it true?

In my search for truth, I came to realize that the Torah goes into great detail on who God is, how He wants us to worship Him, how He wants us to celebrate His Feasts and how these Feasts foreshadow Jesus, how He wants us to behave, and even how He wants us to eat. The Torah is a blueprint given to us for moral and Godly living, and to keep us safe. Yet, as a Christian I was taught and encouraged to believe that, despite all the trouble God took to make His will known in the Torah, that He threw it all out the window when Jesus was born and crucified. It just didn't make sense to me. God: "Here's my Law people, I want you to follow it and obey it." then later on "Hey folks, I've changed my mind, you know that Torah thing I gave you? Scratch that. Even though my Son is the living Torah and was Torah observant His whole life." In truth, in Matthew 5:17 Jesus actually stated "I have come not to abolish Torah but to fulfill it." "Not to abolish the Torah", ---I got it ! I also noticed in reading the Torah that many of the commands include the word "forever". Does God mean "do this forever.......or at least until I change my mind."? What about the Scripture in Malachi 3:6 that tells us "I the Lord do not change." On the one hand, Christians are taught that the Torah -- which is the first five books of the Old Testament and include the Ten Commandments - is not for today. Some people also consider the entire Old Testament to be the Torah. Some people also claim that these writings were given only to the Jews and do not relate to Christians at all. It's funny, because they're saying that the Old Testament is not for Christians today but that Christians should be tithing --- a practice taught in the Old Testament ! Kind of ironic and hypocritical don't you think? But one of the most influential Scriptures for me as I began my research into the Hebraic roots of Christianity is II Timothy 3:16: "All Scripture is God-breathed and is useful for teaching, rebuking, correcting and training in righteousness, 17 so that the man of God may be thoroughly equipped for every good work." I have heard this verse many many times in Christian churches relating it to the New Testament. Yet, when Paul wrote this oft-quoted verse,there was no New Testament, the only Scriptures in writing at that time were the Torah. A fair paraphrase would be to say then that "The Torah is God-breathed and useful for training in righteousness."